There are several reasons for that, one being that independent settlements also auto-construct things, but those outside the map (the parts of the map that cannot be travelled to) are currently frozen, so they have people assigned to production but the production doesn't progress and they don't get the benefits of, say, mills.

Also because a few bonus effects I plan to add are not yet done. I want to reward trade with a "variety" bonus and I want to add something that represents that a palisade and a few guards also reduce the amount of crops and livestock lost to bandits and wild animals.

I am also currently re-working the global game statistics and adding more detailed statistics into the game. It will take a day or two until they have gathered data, so there's nothing to show at this time.

However, one thing I am very excited about is that I will have statistics about realm/settlement ownerships. Or, in other words, I will be able to trace realms through time and see them grow and shrink, much like the BM histories, except that it is actual data and not just images. So, for example, I could ask and answer questions such as "during the past year, how much in % did this settlement belong to which realm?".